This is the second Gregg Shorthand version of The Diamond Necklace, serialized in the Gregg Writer magazine in 1921. It matches the 1916 Pre-Anniversary Gregg Shorthand Manual.
The installments were in the following issues:
Georgie Gregg Gingell created the shorthand plates. The 1923 book version used the identical shorthand plates found in these four 1921 installments.
There are 4 different Gregg Shorthand versions of "The Diamond Necklace":
--Pre-Anniversary 1902 - Serialized in Aug-Sept 1914 Gregg Writer - Never Published
--Pre-Anniversary 1916 - Serialized in June-Sept 1921 Gregg Writer - Published in 1923 - Plates by Georgie Gregg Gingell
--Anniversary - Slightly modified plates from 1923 Pre-Anniversary Edition - Book has same cover and line/page endings as 1923 version - Published March 1930
--Anniversary - Completely revised plates by Winifred Kenna Richmond with standard green Anniversary cover - Published in 1933